Aqueous acid solution
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The plasmon characterization of AgNS on paper was systematically investigated by the diffuse reflectance spectroscopy. The fabricated paper-based SERS substrates were used to detect melamine in an aqueous solution and to determine the influence of type RAs on the enhancement factor (EF) and signal uniformity of SERS substrates. Among the four types of RAs, the SERS substrates used NaBH4 have the highest SERS signal with the limit of detection of 10-8 M for melamine and the EF = 2.3 × 109 .
9p dianmotminh02 03-05-2024 4 1 Download
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In this study, we propose a novel approach for the synthesis of AISe core and highly luminescent AISe/ZnS core/shell NCs in a 2-step procedure. First, the AISe core NCs were produced using both glutathione and citric acid as dual stabilizers at 96 °C for 20 min at different pH values of the reaction solution.
11p dianmotminh02 03-05-2024 5 2 Download
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Ebook "Electrochemistry in nonaqueous solutions" to provide readers with some knowledge of electrochemistry in non-aqueous solutions, from its fundamentals to the latest developments, including the current situation concerning hazardous solvents. The book is divided into two parts. Part I (Chapters 1 to 4) contains a discussion of solvent properties and then deals with solvent effects on chemical processes such as ion solvation, ion complexation, electrolyte dissociation, acid-base reactions and redox reactions.
352p tracanhphuonghoa1007 22-04-2024 2 2 Download
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Ebook "Citric acid" is devoted to different aspects associated with citric acid, inorganic citrates and their aqueous and organic solutions. It includes information about properties, occurrence and technological applications of citric acid and inorganic citrates. Phase equilibria - melting, freezing, boiling, vapour pressures, solubilities of citric acid in water, organic solvents and ternary systems are presented, correlated, and analyzed.
365p tudohanhtau1006 29-03-2024 1 1 Download
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Ebook "Ionic equilibria in analytical chemistry" of general analytical chemistry – as opposed to instrumental analysis or separation methods – in aqueous solutions is focuses on fundamentals, which is an area too often overlooked in the literature. Explanations abound of the chemical and physical principles of different operations of chemical analysis in aqueous solutions.
763p nhanphanguyet 28-01-2024 5 2 Download
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In this study, sugarcane bassage was modified with hydrochloric acid (HCl), sodium dodecyl sulfate (SDS) and ethylenediaminetetraacetic acid (EDTA) before using for methylene blue adsorption in an aqueous solution.
6p vimarillynhewson 02-01-2024 7 2 Download
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Blast-furnace slag (BFS) is enormously generated each year and has been considered as hazardous solid waste which is posing a significant pressure on waste treatment in terms of storage and transportation. This study aims to recycle BFS as a material for ammonium adsorption from an aqueous solution.
11p vialfrednobel 21-12-2023 2 2 Download
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In this study, the thermodynamic dissociation constants of two new quinoline derivatives including (6-hydroxyl-3-sulfoquinoline-7-yloxy) acetic acid and (5-bromo-6-hydroxyl-N-methyl-3-sulfoquinoline-7-yloxy) acetic acid were initially determined in an aqueous solution using potentiometric titration at (25.0 ± 0.1) oC in the ionic medium of 0.10 M KCl solution.
9p visharma 20-10-2023 5 2 Download
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A new parallel-plate capacitor fixture has been designed and successfully used to measure dielectric loss of polyelectrolyte solutions with volumes as low as droplets of 13e26 mL. It is particularly useful when studying polypeptides that are either high-cost or can be synthesized only in limited quantities.
6p viberbers 09-08-2023 4 3 Download
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The zinc borate nanoparticles (2ZnO.3B2O3.3H2O) were successfully prepared by precipitation reaction in aqueous solutions of borax and zinc sulfate using oleic acid as a surfactant. The structural, morphological characteristics and the wettability of the particle surface were studied through Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and the contact angle.
11p viberkshire 09-08-2023 10 5 Download
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This study explored the effect of the presence of sulfate radicals on the degradation rate of PFOA undergoing UV–irradiation. The effects of sulfate concentration, solution temperature and the radical scavengers on the degradation rate of PFOA were investigated.
6p viironman 02-06-2023 6 3 Download
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The presence of heavy metals pollutants in the industrial effluents has become a serious problem for human beings and the environment. In this work, chitosan beads were crosslinked and modified by Saccharomyces cerevisiae (S. cerevisiae) and histidine to enhance its acid stability and mechanical strength and biosorption capacity.
5p vidoctorstrange 06-05-2023 3 2 Download
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The protection of the environment through the recycling of waste brought back many economic-social benefits. Demand for the recycling of the large quantity of activated sludge derived from biological treatment stage of the wastewater treatment plant has become urgent in recent years. This study examined successfully the batch biosorption of Sulfur Brown GD on the recycled material prepared by the acid washing biomass of activated sludge.
5p vidoctorstrange 06-05-2023 5 1 Download
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The adsorption of Cu(II) ions from aqueous solution onto alginic acid has been investigated based on the establishment of a relationship among pH, conductivity and the concentration of metal ion. It was shown that the adsorption of this metal ion onto alginic acid followed the pseudo-second-order reaction and was conducted by ion exchange mechanism.
10p vidoctorstrange 06-05-2023 7 3 Download
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In this study, CNC was isolated from used office papers by means of acid hydrolysis. For CNC/PEO fiber fabrication process, CNC was added to PEO aqueous solution to produce CNC/PEO fibers by electrospinning. In this process, several parameters were investigated, namely PEO concentration, CNC:PEO ratio, the applied voltage, and the distance between the tip and the collector on the morphology of electrospun CNC/PEO fibers.
6p viargus 03-03-2023 3 2 Download
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This study consisted of a novel potential adsorbent material that could efficiently remove chromium (VI) from aqueous solutions. The optimum operating conditions were investigated including pH, agitation period. In this research, biochar derived from fountain grass (Pennisetum setaceum) coated with glutaraldehyde-crosslinked chitosan and treated with succinic acid to add functional groups was used to create an eco-friendly sorbent (CPES).
6p vicedric 08-02-2023 2 1 Download
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Spent pickling liquor containing almost FeCl2 is a considered hazardous waste because of its very high level of acidity and high metal concentration, and the conventional neutralization method regenerates an excessive quantity of sludge that poses a serious problem concerning to the landfill disposal and risk of ground water contamination. Therefore, recovery of spent pickling liquor is necessary.
9p visnape 30-01-2023 5 2 Download
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We examined the properties of the nanocomposite γ-Fe2O3@Chi@Pani as an adsorbent of deoxyribonucleic acid (DNA). As a model system, we used an aqueous solution of salmon sperm DNA, whose decreasing concentration was followed by monitoring the 260 nm UV–vis absorption.
9p vihermione 06-01-2023 7 2 Download
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Hydrogels based on the polysaccharide ulvan from the green macroalgae Ulva fenestrata were synthesized and evaluated as an adsorbent for heavy metals ions and methylene blue. Ulvan was extracted from Ulva fenestrata using diluted hydrochloric acid and recovered by precipitation with EtOH.
13p viginny 30-12-2022 12 2 Download
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This paper presents an extension to a point kinetics model of fissile solution undergoing a transient through the development and addition of correlations which describe neutronics and thermal parameters and physical models.
9p vironald 15-12-2022 7 4 Download